import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-5,0))
w1=cq.Workplane('ZX',origin=(0,3,0))
r=w0.sketch().segment((-3,13),(-3,19)).arc((-19,-1),(-1,-19)).segment((-1,-14)).arc((1,-14),(3,-13)).segment((3,-19)).arc((19,1),(1,19)).segment((1,14)).arc((-1,14),(-3,13)).assemble().circle(2,mode='s').finalize().extrude(-45).union(w0.sketch().segment((-6,-28),(6,-28)).segment((6,28)).segment((-2,28)).segment((-6,28)).close().assemble().push([(1,20.5)]).rect(8,9,mode='s').finalize().extrude(-37)).union(w1.workplane(offset=47/2).moveTo(-12,-20).cylinder(47,3))